If you own a home in Boise and are relocating you might still be able to buy the home in Weiser. When you relocate special rules for financing apply that might help you!
Lease purchases are really hard to do these days although I just submitted another offer today for one. I have closed a lot of them over the years and know what potential pitfalls to watch for.
It is almost 10pm right now so I will wait till tomorrow to call you to learn more specifics to try to help you.